Thin and Flexible Solid Electrolyte Membranes with Ultrahigh Thermal Stability Derived from Solution-Processable Li Argyrodites for All-Solid-State Li-Ion Batteries

Sheet-type solid electrolyte (SE) membranes are essential for practical all-solid-state Li batteries (ASLBs). To date, SE membrane development has mostly been based on polymer electrolytes with or without the aid of liquid electrolytes, which offset thermal stability (or safety). In this study, a new scalable fabrication protocol for thin (40–70 μm) and flexible single-ion conducting sulfide SE membranes with high conductance (29 mS) and...